Whitney Port dresses down as she enjoys a stroll with husband Tim Rosenman and son Sonny

The Hills star Whitney Port spent her Saturday on the go.

The reality alum looked casual while spotted taking a stroll with her husband Tim Rosenmann and her 15-month-old son Sonny.

Port and her husband seemed happy as they tended to their young son while walking down the street.

Happy family: Whitney Port and her husband Tim Rosenmann take a stroll with their 15-month old son Sonny during an outing on Saturday

Happy family: Whitney Port and her husband Tim Rosenmann take a stroll with their 15-month old son Sonny during an outing on Saturday

Whitney was spotted wearing a long-sleeved pink shirt with black stripes and grey sweat pants with multi-colored New Balance running shoes.

The reality star had her hair tied back with a small pendant hanging from her neck, as she carried her cell phone during the walk.

Rosenmann was wearing a plain white t-shirt, grey shorts and white shoes as he pushed his son's stroller.

Port rose to prominence as a cast member on the MTV series The Hills, which debuted in 2006.

Attentive parents: Port was spotted wearing a long-sleeved pink shirt with black stripes and grey sweat pants with multi-colored New Balance running shoes

Attentive parents: Port was spotted wearing a long-sleeved pink shirt with black stripes and grey sweat pants with multi-colored New Balance running shoes

Reality star: Port rose to prominence as a cast member on the MTV series The Hills, which debuted in 2006

Reality star: Port rose to prominence as a cast member on the MTV series The Hills, which debuted in 2006

The show, a spin-off of Laguna Beach: The Real Orange County, following Laguna Beach star Lauren Conrad, her roommate Heidi Montag and her friends Port and Audrina Partridge.

The show, which also followed Brody Jenner, Spencer Pratt, Lo Bosworth and others, ran for six seasons for 113 episodes between 2006 and 2010.

While The Hills was on the air, Port launched her first fashion line, Whitney Eve, in 2008. 

After The Hills went off the air, she moved to New York City to work with Diane von Furstenberg, which lead to the spin-off series The City.

New parents: While The Hills was on the air, Port launched her first fashion line, Whitney Eve, in 2008.

New parents: While The Hills was on the air, Port launched her first fashion line, Whitney Eve, in 2008.

The spin-off emphasized her relationship with then-boyfriend Jay Lyon, who she split up with later in the first season.

Her husband Rosenmann was a producer on The City, who Port started dating in 2012, before they got married in 2015.

The happy couple announced in February 2017 that they were expecting their first child, Sonny, who was born on July 27, 2017.

Port is getting ready to return to The Hills, with MTV announcing the sequel series The Hills: New Beginnings, which will reunite Port with Heidi Montag, Audrina Partridge and more.

Mother and son: The happy couple announced in February 2017 that they were expecting their first child, Sonny, who was born on July 27, 2017

Mother and son: The happy couple announced in February 2017 that they were expecting their first child, Sonny, who was born on July 27, 2017

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Whitney Port dresses down as she enjoys a stroll with husband Tim Rosenman and son Sonny

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